All Patents in class 408/195 |
Patents 16 -
30
of 70
|
Number | Date | Patentee | Title | Type |
RE3,733 | Nov. 16, 1869 | W.A. Clark | Improvement in expansive bits | adjustable drill bits |
97,166 | Nov. 23, 1869 | H.P. Chapman | Improvement in Extension Bit | adjustable drill bits |
107,700 | Sep. 27, 1870 | P. McCormick | Improvement in Washer-Cutters | washer cutters |
111,099 | Jan. 17, 1871 | B. Walch | Adjustable Spur Auger | adjustable drill bits |
RE4,668 | Dec. 12, 1871 | W.A. Clark | Improvement in expansive bits | adjustable drill bits |
130,488 | Aug. 13, 1872 | R.J. Croacher | Improvement in Reamers | tapered reamers |
131,946 | Oct. 08, 1872 | E. Ford | Improvement in expansive bits | adjustable drill bits |
RE5,238 | Jan. 14, 1873 | B. Walch | Improvement in augers | adjustable drill bits |
141,324 | Jul. 29, 1873 | W.A. Clark | Improvement in Expansive Bits | adjustable drill bits |
155,333 | Sep. 22, 1874 | W.L. Parmelee | Improvement in expansion-bits | adjustable drill bits |
160,015 | Feb. 23, 1875 | D. Goodnow, Jr. | Improvement in Devices for Cutting out Sheet-Metal Washers | washer cutters |
168,607 | Oct. 11, 1875 | E. Brule | Improvement in Washer-Cutters | washer cutters |
170,527 | Nov. 30, 1875 | C. Crammer | Improvement in Expansible Tools For Cutting Holes of Different Sizes | adjustable drill bits |
177,982 | May 30, 1876 | J.S. Appleton | Improvement in Washer-Cutters | washer cutters |
209,726 | Nov. 05, 1878 | W.F. Tilton | Improvement in Devices for Cutting Washers | washer cutters |